diff --git a/ChangeLog b/ChangeLog
index cfc360d5a9..6d89471940 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Feb 22 10:57:08 2012  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* regparse.c (fetch_token): don't use // comment.
+
 Wed Feb 22 10:32:11 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* test/mkmf/test_framework.rb: try CoreFoundation framework, than
diff --git a/regparse.c b/regparse.c
index 065e5b214b..183d1fffdf 100644
--- a/regparse.c
+++ b/regparse.c
@@ -3682,7 +3682,7 @@ fetch_token(OnigToken* tok, UChar** src, UChar* end, ScanEnv* env)
 	  cnext = PPEEK;
 	  if (cnext == '0') {
 	    PINC;
-	    if (PPEEK_IS(get_name_end_code_point(c))) {  // \g<0>, \g'0'
+	    if (PPEEK_IS(get_name_end_code_point(c))) {  /* \g<0>, \g'0' */
 	      PINC;
 	      name_end = p;
 	      gnum = 0;